What is glucose and why is it important to all life on earth?

Glucose is an Organic Compound consist of Carbon chain. Its molecular formula is ##"C"_6"H"_12"O"_6##.

It is a carbohydrate and naturally occurring compound and play important part in our daily life as they provide 4 calories per gram.

Glucose is found in grains, wheat, rice and oats and it is also found in fruits and honey.